My son used to go down for the night promptly at around 8. When he became 18 months old he started going through major sleep regression which has gotten better...but now when I try to get him to sleep it takes forever... Tonight he didn't get down until 9:45! I'm losing my mind. I think it's related to his nap...like if he sleeps past 3...but if I wake him then I have a cranky mess on my hands during the day! Help!